Wilwood Dynapro 4R Rear Disc Brake Kit - 12.19 inch Rotors, 74-75 Ford Bronco SKU: 140-13664N
Wilwood Dynapro 4R Rear Disc Brake Kit - 12.19 inch Rotors, 74-75 Ford Bronco
Product Overview:
This group of DPL Pro-Series rear disc kits provides a complete solution for popular muscle car rear axles that require a parking brake. Forged Billet Dynapro Lug Mount four piston calipers, 12.19" one-piece drum/rotors, and high friction pads provide optimized and balanced braking for all types of custom performance street/strip and show machines. The neatly hidden internal shoe system provides a clean installation with superior static holding power for parking. Optional caliper finishes and rotor designs enable the builder to personalize the style and optimize brake performance for every individual application.
Requires minimum 15 inch wheel diameter. Not all 15" wheels will fit. Consult the Wheel Clearance Diagram in additional images to confirm fitment before purchasing.

Full description
Requires minimum 15 inch wheel diameter. Not all 15" wheels will fit. Consult the Wheel Clearance Diagram in additional images to confirm fitment before purchasing.
Wilwood Dynapro 4R Rear Disc Brake Kit | 74–75 Ford Bronco
For Large Bearing Axle with 10" x 2-1/2" Rear Drums | 12.19" Rotors
Take your Bronco’s braking power to the next level with Wilwood's Dynapro 4R Rear Disc Brake Kit. Designed specifically for 74–75 Ford Broncos equipped with large bearing rear axles and 10" x 2-1/2" rear drums, this complete solution brings modern stopping performance to your classic rig.
This kit includes powerful four-piston Dynapro Lug Mount calipers, 12.19" one-piece drum/rotors, and high-friction pads for balanced braking that perfectly complements front big brake upgrades. Plus, it includes an internal parking brake system hidden neatly inside the rotor hat for a clean look and reliable hold.
Ideal for Broncos with 15" wheels, this kit is finished in sleek black for that custom, understated appearance. It works with the Big Ford Bronco axle flange (2" offset), and the forged billet calipers provide premium performance and strength you can count on both on and off the trail.
Customize your look and performance with optional rotor designs and caliper finishes!
Specifications
Specification | Detail |
---|---|
Pistons | 4 |
Rotor Diameter | 12.19" |
Caliper Mount | Lug |
Wheel Diameter | 15" minimum required |
Flange | Big Ford New Style (Bronco) |
Axle Offset | 2.38" |
Finish | Black calipers |
Parking Brake | Integrated internal drum-in-hat design |
Why You Need to Know Your Axle
This kit is specifically designed for Broncos with the large bearing rear axle and 10" x 2-1/2" drum brakes. Confirming your axle type is critical for proper fitment and brake performance. If you need help identifying your axle, see the "Specs" section below!
Note: Brake Kit does not include flex lines. Flex lines are necessary to complete the installation of the kit and must be ordered separately.
Note: Kit may not fit all 15" wheels. Check wheel clearance diagram in kit installation instructions before purchase.
